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The Strength of Shell Bodies: Theory and Practice

Description: "The monocoque form of airplane construction has introduced a number of new problems to the stress calculator and the designer. The problems for the stress calculator fall into two groups: the determination of the stress condition (shell statics) and the determination of the failing strength (shell strength). The present report summarizes the most important theoretical and experimental results on this subject" (p. 1).
Date: September 1937
Creator: Ebner, H.
Item Type: Refine your search to only Report
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Strength Tests on Hulls and Floats

Description: "The present report deals with strength tests on hulls and floats intended in part for the collection of construction data for the design of these components and in part for the stress analysis of the finished hulls and floats" (p. 1).
Date: June 1942
Creator: Matthaes, K.
Item Type: Refine your search to only Report
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Stress Analysis of Circular Frames

Description: "The stresses in circular frames of constant bending stiffnesses, as encountered in thin-wall shells, are investigated from the point of view of finite depth of sectional area of frame. The solution is carried out for four fundamental load conditions. The method is illustrated on a worked out example" (p. 1).
Date: December 1941
Creator: Fahlbusch, H. & Wegner, W.
Item Type: Refine your search to only Report
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The stress criterion of a tension member with graded flexural stiffness: contribution to the problem of "clamping effect" outside of the elastic range

Description: The approximate size of the stress criterion of a bar on two supports stressed beyond the elastic range is assessed by an approximation. The calculation proceeds from the premise of "substitute flexural stiffness" so defined that the part stressed beyond the elastic range may be considered as following Hooke's law when determining the flexural deformation quantities. For the determination of the substitute flexural stiffness, it is presumed that the material is already stressed so much beyond t… more
Date: September 1936
Creator: Kaul, Hans W.
Item Type: Refine your search to only Report
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Stresses Developed in Seaplanes While Taking Off and Landing

Description: In the case of seaplanes, the lack of elastic shock absorbers, the presence of which might be quite dangerous, especially in taking off, makes it necessary to give some consideration to the phenomenon of landing. Special consideration must be given the process of taking off, since even moderately rough water may develop rather large stresses. The purpose of this communication is to show what has been accomplished in Italy and other countries and to draw a few useful conclusions.
Date: July 1932
Creator: Verduzio, Rudolfo
Item Type: Refine your search to only Report
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The Stresses in Columns Under Combined Axial and Side Loads

Description: The problem before us is to determine the total stresses in an axially loaded column of any degree of restraint which is also subject to transverse bending both from a uniformly distributed load and from concentrated loads. The solution of this problem is of special importance in the design of aircraft which consist of slender columns" (p. 1).
Date: July 1922
Creator: Arnstein, Karl & Truscott, Starr
Item Type: Refine your search to only Report
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Stresses in Reinforcing Rings Due to Axial Forces in Cylindrical and Conical Stressed Skins

Description: "At the ends of a monocoque fuselage concentrated axial forces in the skin must generally be taken up. Such axial forces must also be taken up in the case of other members where axial forces from the neighboring stressed skin construction must be considered. In order to take up these axial forces two bulkheads or reinforcing frames may be arranged at the positions where the forces are applied" (p. 1).
Date: January 1938
Creator: Drescher, K. & Gropler, H.
Item Type: Refine your search to only Report
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Stresses in Single-Spar Wing Constructions With Incompletely Built-Up Ribs

Description: It is shown that the force distribution resulting from incomplete ribs in single spar wing structures may be determined with the aid of the shear field method by a statistically indeterminate computation. A numerical computation is given of the force distribution of a wing structure whose two neighboring incomplete ribs with web missing in half the section are torsionally loaded.
Date: March 1940
Creator: Reinitzhuber, F.
Item Type: Refine your search to only Report
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The Stresses in Stiffener Openings

Description: The present study treats as a typical example a ring the center line of which is produced by the intersection of two circular cylinders of different diameter. Three load cases are analyzed: (1) Axial and circumferential stresses in both cylinders, the cylinder stresses themselves to be in the ratio conformal to the cylinders loaded under internal pressure. (2) Pure longitudinal tension in the large cylinder. (3) Pure shear (torsion) in the large cylinder.
Date: February 1942
Creator: Marguerre, K.
Item Type: Refine your search to only Report
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Stresses Produced in Airplane Wings by Gusts

Description: Accurate prediction of gust stress being out of the question because of the multiplicity of the free air movements, the exploration of gust stress is restricted to static method which must be based upon: 1) stress measurements in free flight; 2) check of design specifications of approved type airplanes. With these empirical data the stress must be compared which can be computed for a gust of known intensity and structure. This "maximum gust" then must be so defined as to cover the whole ambit o… more
Date: January 1932
Creator: Küssner, Hans Georg
Item Type: Refine your search to only Report
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Structural and Economic Limits to the Dimensions of Airships

Description: "In opposition to the advantage of larger dimensions, there is one disadvantage, namely, the weight of the structure increases more rapidly than the buoyancy. It is not possible, however, to determine a general law. In order to formulate one having the merit of simplicity, we will divide the structure into two parts: one subject to tensile and compressive stresses, varying directly as the ascensional or lifting forces; the other subject to varying stresses of the surface areas" (p. 1).
Date: August 1924
Creator: Crocco, G. A.
Item Type: Refine your search to only Report
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The Structure of Airy's Stress Function in Multiply Connected Regions

Description: In solving two-dimensional problems using Airy's stress function for multiply connected regions, the form of the function depends on the dislocations and boundary forces present. The structure of Airy's function is shown to consist of a part expressible in terms of boundary forces and a part expressible in the manner of Poincare. Meanings of the constants occurring in Poincare's expression are discussed.
Date: July 1951
Creator: Grioli, Giusippe
Item Type: Refine your search to only Report
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A Study of Curvilinear Flight

Description: "When an airplane describes a curve it takes a certain time for it to turn from level to inclined position and then back to level again. In the following, we express the motion about the horizontal axis as "roll" or "bank" and the motion perpendicular to the vertical axis, i.e., the actual curve, as "turn." Equations and tables provide results on various aspects of turns, control settings, acceleration, inertia moments, and angular velocity" (p. 2).
Date: April 1931
Creator: Kruse, Helmuth
Item Type: Refine your search to only Report
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Study of the Micro-Nonuniformity of the Plastic Deformation of Steel

Description: "The plastic flow during deformation of real polycrystalline metals has specific characteristics which distinguish the plastic deformation of metals from the deformation of ordinary isotropic bodies. One of these characteristics is the marked micro-nonuniformity of the plastic deformation of metals. P.O. Pashkov demonstrated the presence of a considerable micro-nonuniformity of the plastic deformation of coarse-grained steel wit medium or low carbon content" (p. 1).
Date: August 1957
Creator: Chechulin, B. B.
Item Type: Refine your search to only Report
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Study of the Supersonic Propeller

Description: In this paper a propeller having all sections operating at supersonic speeds is designated a supersonic propeller regardless of flight speed. Analyses assume subsonic flight speeds but very high rotational speeds. A very elementary analysis of the efficiency of a jet-propeller system is presented. A propeller analysis based on conventional vortex blade element theory is presented and reduced to a single point method which leads to an expression for optimum advance ratio in terms of hub-tip diam… more
Date: March 1953
Creator: Fabri, Jean & Siestrunck, Raymond
Item Type: Refine your search to only Report
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